My '99 ML320 is a great vehicle but I have one big beef:
When I purchased it I accepted that it did not have automatic climate control. Now I believe that it doesn't have any climate control.
The air flow to the feet in both the front and rear seats seems totally inadequate. While in cold weather, say 20 deg.F, Everyones feet freeze. When the outside temperature is 60deg F I have to turn on the air conditioning.
I have had it to the dealer twice and they say there is nothing wrong with it. I have to conclude that it is a faulty design if that is true.
I have not been able to get any specs on air flows, velocities or the minimum delta T on the heater (temp. selector turned to max. cool and a/c off.)
Any help on this topic would be appreciated.

Joe M